The children of David and Abiah named on this site include only those named in David's will. David's son Solomon I. Knapp, an executor of the will, declared in probate that there were no other heirs or next of kin. There may have been children who died before the will was written in 1834 and are not in this list.
The following were named as David's children in A.A. Knapp's Nicholas Knapp Genealogy but were not in David's will.
H-707 David, m. Hannah Osborne. I have placed this David in Solomon Knapp's family for reasons explained in a note on David Benjamin Knapp's page of this site.
H-708 Mary, m. David Ashley, Grafton, Ohio. David Ashley was merely the official in Grafton, Ohio who deposed William McConnell and E.C. McConnell, the witnesses who saw David sign his will. Ashley was not otherwise mentioned in the probate papers or will.
H-717. John, b. before 1806. m. Jane ________
H-718. Benjamin.
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Documents

Will of David Knapp of Mayfield, New York (pdf)Will made 15 Sep 1834.
Legatees: David's wife Abiah and his children Hannah, wife of Barent Dennie; Orenda, wife of David Fonda; Catherine wife of Michael Dennie; Helen, wife of Samuel Fairbanks, Sally, wife of Robert Wilkins, Rachel, unmarried; Samuel and Solomon I.
Witnesses: E.C. McConnell and Wm. McConnell.
Entered into probate 29 October 1842. Proved 6 Feb 1843.